Notifications

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Learn about the technical aspects of notification delivery on device, including notification types, priorities, and notification center management.

Notifications Documentation

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Certification Authority (CA) for Apple Push Notification service (APNs)
I got a notification that the Certification Authority (CA) for Apple Push Notification service (APNs) is changing. Does this affect the push service for Apple Wallet passes or just for apps? I have a push service for Apple Wallet passes but no service for apps. I don't use push notification service for anything other than for Apple Wallet Pass push notifications, not at all for apps. Is there anything I need to do or is this not relevant to my situation? If it does, what do I need to change in order to make sure my service still works? Do I just replace the certificate? Is there a standard path where it would live on the server? I'm sure this is a simple thing, but it's been over a decade since I wrote the push service so I'm pretty rusty.
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413
Feb ’25
Critical Notifications
Hey Together, I have seen that critical notifications need to be confirmed by apple to be used. Sadly I couldn't figure out where to ask for that. Context: I have a sports tournament app for Beach Handball. There are a couple of Courts like up to 20-25. The main use for that in my app would be to notify first aiders/Medics. Right now they are called in via Speakers or by the referees just writing that into a WhatsApp chat. As this takes a long time and the speakers can be deactivated due to rain, power shortage or even the medics sometimes are not in range to exactly hear the speakers calling them. To Speed up this process I want them to download the App, Register via an E-Mail or a One Time Code. Now if a referee needs immediate Help from the Medics on their court they can send the Critical alert to the Medics without having to write a chat into a WhatsApp group, to get a call through the speakers 10 minutes later which the medics may not even hear. A couple of weeks ago we had a player falling on her back/neck/head and they couldn't figure out if she broke her neck or not. Luckily the medics were right next to the court and saw that. but what would happen if they were a couple hundred of meters away and did not notice that? I mean the PA system was off due to a power shortage. someone trying to move her? Risking her death? And while we are at it we could add those notifications if a team is missing to a court for a game that already should've started. Critical because it is urgent. Those notifications are handled with care.
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66
Jul ’25
Received a warning from Apple regarding updating APNs ceritificate.
"As we announced in October, the Certification Authority (CA) for Apple Push Notification service (APNs) is changing. APNs will update the server certificates in sandbox on January 20, 2025, and in production on x date, 2025. To continue using APNs without interruption, you’ll need to update your application’s Trust Store to include the new server certificate: SHA-2 Root : USERTrust RSA Certification Authority certificate. To ensure a smooth transition and avoid push notification delivery failures, please make sure that both old and new server certificates are included in the Trust Store before the cut-off date for each of your application servers that connect to sandbox and production. At this time, you don’t need to update the APNs SSL provider certificates issued to you by Apple." As we are using firebase for receiving notifications and azure notification hub, I read that there is nothing we as developers need to do and will be handled by the providers right?
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534
Feb ’25
How can notification action buttons' text be center aligned?
The iOS documentation shows notification actions buttons with the text center aligned: https://developer.apple.com/documentation/usernotifications/declaring-your-actionable-notification-types But there's no apparent way for an app to control this. The buttons are controlled and rendered by the system and the text is always left aligned. Is there some way to get the text center aligned?
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83
Aug ’25
Alternate App Icon Change Does Not Reflect in Notification Center on iOS 18.1+
Version: iOS 18.1 and later (works as expected on iOS 18.0 and earlier) Area: SpringBoard / Notification Center / App Icon Rendering Description: When changing the app's alternate icon using UIApplication.setAlternateIconName(_:completionHandler:), the icon is updated correctly on the Home Screen and App Switcher. However, in Notification Center, the old app icon is still shown for notifications, even after the change has completed. This issue only occurs on iOS 18.1 and later. In iOS 18.0 and earlier, Notification Center correctly reflects the updated icon. - Steps to reproduce: Create an iOS app with alternate app icons configured in the Info.plist. Use UIApplication.shared.setAlternateIconName("IconName") to change the icon at runtime. Send a notification. Pull down Notification Center and observe the icon shown beside the notification. - Expected Behavior: Notification Center should reflect the updated (alternate) app icon immediately after the change. - Actual Behavior: Notification Center continues to display the old (primary) app icon. The new icon appears correctly on the Home Screen and App Switcher. Restarting the device does cause Notification Center to update and reflect the correct icon, which suggests a cache or refresh issue in SpringBoard or Notification Center. - Notes: Issue introduced in iOS 18.1; not present in 18.0. Reproduces on both physical devices and simulators. Occurs with both scheduled local notifications and remote notifications. Restarting the device updates the Notification Center icon, but this is not a viable user-facing workaround.
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191
Apr ’25
Are notification pushes not being received when in Picture-in-Picture mode?
Hello, I recently had an unusual experience, and I’m wondering if this is related to Apple’s policies, so I wanted to ask. While a call is in Picture-in-Picture (PIP) mode, notification pushes from the same app do not appear. The API is being triggered, but the notification banner does not show on the device. Once PIP is closed, the notifications start appearing normally again. Is this behavior enforced by Apple’s policies? What’s interesting is that banners from other apps do appear — only the banners from the app currently in PIP are not shown.
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169
Dec ’25
Got com.apple.developer.usernotifications.filtering entitlement still not able to suppress notifications
I got notification filtering permission from appStoreConnect, i.e. com.apple.developer.usernotifications.filtering, but not able to suppress notification even after setted contentHandler(UNNotificationContent()) and contentHandler(UNMutableNotificationContent()). Added entitlements in both extension and main app, also in signing profile these Entitlements are visible, what other changes should I do?
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106
Nov ’25
Not Receiving Incoming VoIP Push Notifications on iOS 18.4 (React Native App)
Hi Apple Dev Team, We have a React Native application that includes call functionality using PushKit and VoIP notifications. We are using APNS to send the VoIP notifications, and everything has been working smoothly on iOS versions up to 18.3.1. However, after updating to iOS 18.4, we are no longer receiving incoming VoIP push notifications on the device. There have been no code changes related to our PushKit or notification logic — the exact same build continues to work correctly on devices running iOS 18.3.1 and earlier. We're trying to understand if anything has changed in iOS 18.4 that affects VoIP push delivery or registration behavior. Would appreciate any guidance, and happy to share code snippets or configuration if needed. Thanks in advance!
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154
Apr ’25
Background Push Notifications for Emergency App Delayed Despite Critical Alert Entitlement
I’m using Appnotic from my server to send notifications for an emergency service, where it is critical that notifications are delivered immediately. My payload looks like this: "aps": { "alert": "Test alert", "sound": { "critical": 1, "name": "sound.wav", "volume": 0.5 }, "content-available": 1, "category": "alert" }, "topic": "com.fireservicerota.FSR-Primary-Alerting", "custom_payload": { "id": "11", "type": "alert", "incident_id": 23434, "incident_response_id": 2652343, "expiration_time": "2024-06-06T16:59:05+01:00" } } I already have the critical alert entitlement and background processing enabled. Everything seems fine when debugging, but I’m experiencing issues: • Some notifications never arrive • Around 60% of notifications arrive with noticeable delay Since this is an emergency app, delivery speed is crucial. What could be causing this inconsistency?
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137
Apr ’25
Push Notifications and VOIP call not working.
My App supports two services that is Push Notification for Alerts and a Voip Call feature whose notification also comes in the same way as of PushNotification but video rendering is done with GoogleWebRTC. The App was working perfectly fine but from past few months these services are not working.[ Nothing is changed in App and on the server side to push the notifications] Issues: VoIP (Video call) not working: I have apns certificate which is valid in today's date and stays with the backend Server. My server sends the payload notification to APNS but on iPhone am unable to receive it. I have checked the App registration part also and is able to receive the token for the same. Framework used are: PushKit, UserNotifications, GoogleWebRTC . I don't understand where is the gap, the backend triggers the APNS but there no response. Ports enabled on server are: 443, 5223, 2197, 2195, 2196. Similarly Push notification were also not working, So I tried to change it to register on Firebase for device registration token And did some coding at backend to send the notification to that device. It was working perfectly fine from last few weeks, but it suddenly stopped. I checked the JSON Payload and tried to send it through PostMan, in both it says 200 Success. And in Application end am waiting for breakpoint to hit in userNotificationCenter(_: , willPresent, completionHandler). What all I have checked: 1)My server to APNS server connectivity. 2)Verified the apns certificate. The certificate was created in October 2024, whose expiry is in Nov 2025 and it support both Sandbox and Production environment. 3)Checked required delegates are implemented in App. With the capability enable in it, is also sending registration token to backend. Kindly guide me where I can check in this flow. Thanks in Advance!
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106
Jul ’25
Wake up the app when you receive a notification in the background
Hello, I am encountering an issue with maintaining socket connections in iOS applications that need to remain active while in background mode. I am developing an application that requires maintaining an active socket connection in the background to receive real-time data. However, I've noticed that the socket connection is terminated as soon as the app enters background mode, which affects the intended functionality of my app. I understand that there are restrictions on background activities in iOS to preserve battery life and system resources. However, I would like to know what approach Apple recommends for handling this type of requirement. Are there specific APIs or configurations I should consider to ensure the socket remains active in the background? I would greatly appreciate any guidance or resources you could provide. I am eager to ensure that my app complies with Apple's guidelines and delivers the best possible experience for users.
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199
Feb ’25
AlarmKit alarms do not fire when foregrounded app is in landscape
Hello! When setting an alarm in an AlarmKit app, the alarm will not fire properly/reliably (the alert presentation is not shown) while the device has an app foregrounded in the landscape orientation. This behaviour has been present since the betas, however until the first party Reminders app showed the behaviour in the iOS 26.2 beta I suspected the issue was in my own code. The behaviour is exhibited when scheduling alarms in several AlarmKit apps: The Reminders app The AlarmKit WWDC Demo Project My own AlarmKit app However alarms scheduled by the stock Clock app do not seem to exhibit the behaviour. Minimal repro with first party app: Be using iOS 26.2 beta Open Reminders app Create an urgent reminder for a time in the not too distant future Open Mail.app Change to landscape orientation Wait for the fire time Observe the phone vibrates at the correct time but no alarm is fired Drag the notifications pane down, observe the LiveActivity has been started Change to portrait orientation Observe alarm fires I have noticed this behaviour from the AlarmKit apps mentioned while foregrounding other apps besides Mail, both first and third party: Photos YouTube Netflix The behaviour does not seem to occur when the foregrounded app is restricted to portrait mode, no matter the actual orientation of the device. In the case of my own app I have tried a multitude of ideas to get it to work reliably, getting alarms to fire in landscape is very intermittent at best and most often works after a fresh reboot. I've submitted a Feedback for the Reminders app: FB20956492. Any advice or suggestions would be appreciated!
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186
Nov ’25
Delivery of expired voip notifications
Hello, We are facing issue that sometimes a voip notification gets delivered after it is expired. The issue can be simply demonstrated we set the device to flight mode, and after 20s we disable flight mode. We still receive the voip notification. We are setting the expiration header as following apns-expiry=0, so from my understanding it should not be delivered if the device was not able to receive the notification in the fist attempt. I have read following thread https://developer.apple.com/forums/thread/778512, from which I understand this is a long standing issue. Hence my question is, is there any way how we can notify the call kit that the call is actually no longer valid, and do not display the call to the user at all? Currently we are forced to always display CallKit call when the notification comes, and some of our users are confused that they see a missed call which they did not have any chance to pick up. Please let me know if you need any more information. Best Regards, Adam Chlupacek
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102
Nov ’25
Does UNNotificationRequest have a 64-notification scheduling limit?
Hi, We have a simple calendar reminder app that uses UNNotificationRequest to schedule local notifications for user events. I’m wondering whether UNNotificationRequest has a system-imposed limit of 64 upcoming scheduled notifications, similar to the deprecated UILocalNotification. We’re asking because one of our users is not receiving recently scheduled reminders. Our current workflow is: We schedule notifications on app launch and when the app is about to quit. Before scheduling, we call removeAllPendingNotificationRequests(). We then fetch the 64 nearest upcoming events and schedule them using UNUserNotificationCenter.current().add(...). This approach works fine during our testing, but we’re unsure what might be causing the issue for some users. Any insights would be appreciated. Thanks!
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225
Jan ’26
iOS 26 Notification Extension open(uri) Fails on Cold Start (LSApplicationWorkspaceErrorDomain Code=115)
I'm experiencing a critical regression on iOS 26 with a Notification Content Extension. extensionContext.open(uri) fails to open external URLs with LSApplicationWorkspaceErrorDomain Code=115 under specific conditions. Problem: When the main app is killed, and a rich push notification is received and expanded, tapping a button (specifically one with a transparent background, cornerRadius=0, clipsToBounds=false) fails to open its associated URL. Key Details: iOS 26 Only: Works perfectly on iOS 17, 18, etc. App Killed State Only: Works if the app is running (foreground/background). Works on Subsequent Notifications: The link will open if a second notification is received. LSApplicationQueriesSchemes: Confirmed to be correctly configured in the main app's Info.plist and present in the app bundle. Delay No Help: Adding a 1s delay before open(uri) does not fix it. My os_log statements confirm the button tap
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Nov ’25
Real-time notification
I need to create a background notification that counts down time and uses buttons to add or subtract time. Currently, I'm developing in React Native and using Expo Go to develop my app. I managed to display a simple notification, but I can't get it to work in real-time, so that when the time is up, it emits a sound indicating that the break is over. How can I implement this feature? My application now: My goal:
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Nov ’25
APNs "Discarded - Token Unregistered" showed an upward trend, from millions to tens of millions.
Dear Apple Engineer Recently we found that our push delivery rate has decreased. On the website "https://icloud.developer.apple.com/dashboard/notifications/teams/43Y657P48S/app/com.taobao.fleamarket", we found that starting from January 8, 2025, "Discarded - Token Unregistered" showed an upward trend, from millions to tens of millions. We have not found the reason, and hope you can help us. Team ID: 43Y657P48S Bundle ID: com.taobao.fleamarket Here are some failed tokens, in "Device Token Validator" The query is valid, but the user cannot receive the message: 56025f656cc3aa701898037f59e8d0cb937263ff5585cd1cec9ae661dcc15b19 5fbbd1e604d3662d7583e9377676f8fa276005145278d6dea04b4fc85a7b070e f0970602551f8d249d8f97960a74006ad78688b52fec6b0d19a585 207caff62e 9388fb40209c100afc2db728342f6fe86c7e34787a8fe4a92b73d2503c5286e0 a2819a4708462588b07452ed827d9afb03c343b586e70dcb67a9981f76295704 8949373cd43783fa3e23d38d55ee1fd72475b39f9c2d2fedca3ecb925b094240 Best Regards!
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Nov ’25